Cast umbrella base



FIG. 1 is a perspective front view of a cast umbrella base in accordance with the invention;

FIG. 2 is a front view of the cast umbrella base of FIG. 1, the rear view and side views of which are the same;

FIG. 3 is a top view of the cast umbrella base of FIG. 1; and,

FIG. 4 is a bottom view of the cast umbrella base of FIG. 1. 

The ornamental design for a cast umbrella base, as shown and described. 